Web Animations API: Bindings for TimedItem.specified with readonly attributes

Source/platform/animation/TimingFunction.cpp

Index: Source/platform/animation/TimingFunction.cpp
diff --git a/Source/platform/animation/TimingFunction.cpp b/Source/platform/animation/TimingFunction.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..f196dab07a1270fabd7cc1599bd541351438e967
--- /dev/null
+++ b/Source/platform/animation/TimingFunction.cpp
@@ -0,0 +1,104 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "config.h"
+#include "platform/animation/TimingFunction.h"
+
+namespace WebCore {
+
+String LinearTimingFunction::toString() const
+{
+    return "linear";
+}
+
+double LinearTimingFunction::evaluate(double fraction, double) const
+{
+    ASSERT_WITH_MESSAGE(fraction >= 0 && fraction <= 1, "Web Animations not yet implemented: Timing function behavior outside the range [0, 1] is not yet specified");
+    return fraction;
+}
+
+String CubicBezierTimingFunction::toString() const
+{
+    switch (this->subType()) {
+    case CubicBezierTimingFunction::Ease:
+        return "ease";
+    case CubicBezierTimingFunction::EaseIn:
+        return "ease-in";
+    case CubicBezierTimingFunction::EaseOut:
+        return "ease-out";
+    case CubicBezierTimingFunction::EaseInOut:
+        return "ease-in-out";
+    case CubicBezierTimingFunction::Custom:
+        return "cubic-bezier(" + String::numberToStringECMAScript(this->x1()) + ", " +
+            String::numberToStringECMAScript(this->y1()) + ", " + String::numberToStringECMAScript(this->x2()) +
+            ", " + String::numberToStringECMAScript(this->y2()) + ")";
+    default:
+        ASSERT_NOT_REACHED();
+    }
+    return "";
+}
+
+double CubicBezierTimingFunction::evaluate(double fraction, double accuracy) const
+{
+    ASSERT_WITH_MESSAGE(fraction >= 0 && fraction <= 1, "Web Animations not yet implemented: Timing function behavior outside the range [0, 1] is not yet specified");
+    if (!m_bezier)
+        m_bezier = adoptPtr(new UnitBezier(m_x1, m_y1, m_x2, m_y2));
+    return m_bezier->solve(fraction, accuracy);
+}
+
+String StepsTimingFunction::toString() const
+{
+    StringBuilder builder;
+    switch (this->subType()) {
+    case StepsTimingFunction::Start:
+        return "step-start";
+    case StepsTimingFunction::End:
+        return "step-end";
+    case StepsTimingFunction::Custom:
+        builder.append("steps(" + String::numberToStringECMAScript(this->numberOfSteps()) + ", ");
+        builder.append(this->stepAtStart() ? "start" : "end");
+        builder.append(")");
+        break;
+    default:
+        ASSERT_NOT_REACHED();
+    }
+    return builder.toString();
+}
+
+double StepsTimingFunction::evaluate(double fraction, double) const
+{
+    ASSERT_WITH_MESSAGE(fraction >= 0 && fraction <= 1, "Web Animations not yet implemented: Timing function behavior outside the range [0, 1] is not yet specified");
+    return std::min(1.0, (floor(m_steps * fraction) + m_stepAtStart) / m_steps);
+}
+
+String ChainedTimingFunction::toString() const
+{
+    StringBuilder builder;
+    builder.append("chained(");
+    for (size_t i = 0; i < this->m_segments.size(); i++) {
+        ChainedTimingFunction::Segment segment = this->m_segments[i];
+        builder.append(segment.m_timingFunction->toString());
+        builder.append("[" + String::numberToStringECMAScript(segment.m_min) + " -> " + String::numberToStringECMAScript(segment.m_max) + "]");
+        if (i+1 != this->m_segments.size()) {
+            builder.append(", ");
+        }
+    }
+    builder.append(")");
+    return builder.toString();
+}
+
+double ChainedTimingFunction::evaluate(double fraction, double accuracy) const
+{
+    ASSERT_WITH_MESSAGE(fraction >= 0 && fraction <= 1, "Web Animations not yet implemented: Timing function behavior outside the range [0, 1] is not yet specified");
+    ASSERT(!m_segments.isEmpty());
+    ASSERT(m_segments.last().max() == 1);
+    size_t i = 0;
+    const Segment* segment = &m_segments[i++];
+    while (fraction >= segment->max() && i < m_segments.size()) {
+        segment = &m_segments[i++];
+    }
+    return segment->evaluate(fraction, accuracy);
+}
+
+} // namespace WebCore